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. 2013 Nov 5;13(11):15048–15067. doi: 10.3390/s131115048

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Figure 4. — Sample results from different feature extraction methods: (a) Finger-vein images from two databases (Top left image from database A and bottom left image from database B); (b) Vein pattern from maximum curvature; (c) Vein pattern from mean curvature; (d) Even Gabor with Morphological; (e) Vein pattern from difference curvature; and (f) Orientation pattern from difference curvature.